Shaft-coupling.



PATENTED FEB. 25, 1908. T. P. VANDEGRIPT 8: W. JOHNSTON.

SHAFT COUPLING.

APPLICATION FILED AUG. 1.1907.

which may be UNITED STATES PATENT ()FFICE' THEODORE F. VANDEGRIFT AND WILLIAM JOHNSTON, OF SHELBYVILLE, INDIANA.

SHAFT-COUPLING.

Specification of Letters Patent.

Application filed August 1' 1907. Serial No. 386.629.

Patented Feb. 26, 1908.

To all whom it may concern:

Be it known that we, THEODORE F. VAN- DEGRIFT and WILLIAM JOHNSTON, citizens of the United States, residing at Shelbyville, I

the. object of the invention is to provide a.

coupling sleeve of such construction that the same is adapted to connect the adjacent ends of shafts in such a manner that the same may turn, one section independent of the other, for a short distance when the direction of rotation is chan ed, for the purpose of avoiding shock incirfent to an immediate reversal of the direction of motion, and with such and other ends in view, our invention consists in the construction and combination of the parts, as will be hereinafter set forth and specifically pointed out in the claim.

In the accompanying drawings, which illustrate an approved form of our invention, Figure l is aiongitudinal section. Figs. 2 and 3 are cross sections on the lines 22 and 3-3. Fig. 4 is a detail perspective view, showing form of bushing used between the shafts and the sleeve. .Fig. 5 is a side elevation of the bushing. Fig. 6 shows the larger binding rolls, and Fig. 7 shows a disk that is placed within the sleeve and between the ends of the shafts.

Referring to the drawings, A indicates the shaft and B' the coupling sleeve or collar, such sleeve having a longitudinal bore that is slightly greater in diameter than the diameter of the shafts to which such. sleeve is applied. The sleeve may be constructed as a part of a pulley or .wheel,'and when the shafts which are to be connected are of different diameters the sleeve is bored to correspond therewith. The sleeve B is provided through its transverse center with a'l'hole or opening B in ]placed a bar or tool that is used to center t The sleeve is made up of one solid piece of metal and has on opposite sides chambers O and C such chambers having walls that are eccentric to the axis of the sleeve or centers of the shafts, and the chambers or recesses are positioned so that the ends be nearer the e shafts and for turning the sleeve or one of the shafts, as may be desired.

-l ends of the sleeve than they are to the center l thereof.

The chambers or recesses O, C- may be a ainst the curved walls are laced metal p ates D, D, preferably of stee such plates eing held in place by'their inherent resilil ency, and against such steel plates and the exterior of the shafts clamping or friction rollers will impinge. Before. applying or inserting the shafts in the sleeve, there are laced within the bore of the sleeve soft meta l bushings E, E, shown in detail by Figs. 4 and 5 of the drawings,

copper which are cut to provide end ortions e and e. Such bushings when ap ed are adapted to overlie the shafts and-to cave uncovered the eccentric recesses in the sleeve,

against the shafts and the segmental plates pair of smaller rollers being used in each eccentric recess or chamber.

G, refers to a disk which is of about the same diameter as thebore in the sleeve B, such disk being placed in the sleeve prior to the insertion of one of the bushings E, and the function of the disk is to keep the ends desirable particularly when the sleeve is used such bushings being made from plates of.

D, D. The rollers F are provided with circumferential corrugations or recesses, while the smaller rollers f have plain surfaces, "a I of the shaft from coming together. This is to couple the ends of a shaft which has been cast or otherwise formed in the sleeve and so that the clamping rollers F, f, may bear broken, and it will be noted that the bushings E, E, are of such size that the disk may occupy a position to one side of the aperture B.

In practice the segmental plates D, D, are placed in the eccentric recesses in the sleeve, and one of the soft metal bushings E is put in the tubular portionof the sleeve, a disk G which is of the same diameter as the bore of the sleeve'is inserted from the opposite end of the sleeve. prevent the ends of the shafts abutting or I passing beyond the center of the sleeve, and the disk will be held in place by the second bushing. When the plate D, bushing E and the disk G have been properly positioned the sleeve is turned to locate one of the eccentfc recesses downward and the rollers f, F andf are placed in the eccentric recess. The i shaft is then inserted in 'the sleeve. After 1 one of the sections of the shaft has been inserted in the sleeve the sleeve is turned and the other plate, bushing and rollers are put in the sleeve, and the other section of the shaft placed in'position, so that the two sections will be coupled one to the other.

Having thus set forth our invention, hat We claim as new and desire to secure by Letters Patent, is

1. In a shaft coupling, a sleeve l'iaving a longitudinal bore the diameter thereof being greater than thedian'ieterof the shafts upon which the sleeve is placed and eccentric recesses formed in the sleeve between its ends and on opposite sides of the bore, longitu dinally divided bushings having end portions which encircle the shafts, said lnishings being cut away at points opposite the eccentric recesses, and clamping rolls nniintained within the spaces formed bv the eccentric recesses,

for the purpose set forth;

2. In a shaft coupling, a sleeve having a longitudinal bore and rec'esseson opposite sides of the bore and between the ends of the 5 sleeve, bushings which encircle the shafts and are cut away at points opposite the recesses, and a plurality of clamping rolls of different diameters located in each of the eccentric recesses, substantially as shown.

3. In a shaft coupling, a sleeve having a longitudinal bore of greater diameter than the shafts to which the sleeve is to be applied, such sleeve having eccentric recesses formed therein, the recesses being located be,

tween the ends of the sleeve and on opposite sides of the bore therethrough, bushings which are cut away opposite'the recesses, curved plates maintained in the recesses, clamping rolls between the plates andthe shafts, and a disk between the ends of the shafts, substantially as shown and. for the purpose set forth. I

THEODORE F. VANDEGRIFT. WILLIAM JOHNSTON. \Vitnesses: WVILLIAM ScnonLcn,

ROBERT H. KAsTnn. 

